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d41ced01 JC |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify it | |
3 | * under the terms of the GNU General Public License version 2 as published | |
4 | * by the Free Software Foundation. | |
5 | * | |
6 | * Copyright (C) 2012 Thomas Langer <thomas.langer@lantiq.com> | |
97b92108 | 7 | * Copyright (C) 2012 John Crispin <john@phrozen.org> |
d41ced01 JC |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
f8cd170d JC |
11 | #include <asm/cacheflush.h> |
12 | #include <asm/traps.h> | |
d41ced01 JC |
13 | #include <asm/io.h> |
14 | ||
15 | #include <lantiq_soc.h> | |
16 | ||
17 | #include "../prom.h" | |
18 | ||
19 | #define SOC_FALCON "Falcon" | |
20 | #define SOC_FALCON_D "Falcon-D" | |
21 | #define SOC_FALCON_V "Falcon-V" | |
22 | #define SOC_FALCON_M "Falcon-M" | |
23 | ||
24 | #define COMP_FALCON "lantiq,falcon" | |
25 | ||
26 | #define PART_SHIFT 12 | |
27 | #define PART_MASK 0x0FFFF000 | |
28 | #define REV_SHIFT 28 | |
29 | #define REV_MASK 0xF0000000 | |
30 | #define SREV_SHIFT 22 | |
31 | #define SREV_MASK 0x03C00000 | |
32 | #define TYPE_SHIFT 26 | |
33 | #define TYPE_MASK 0x3C000000 | |
34 | ||
35 | /* reset, nmi and ejtag exception vectors */ | |
36 | #define BOOT_REG_BASE (KSEG1 | 0x1F200000) | |
37 | #define BOOT_RVEC (BOOT_REG_BASE | 0x00) | |
38 | #define BOOT_NVEC (BOOT_REG_BASE | 0x04) | |
39 | #define BOOT_EVEC (BOOT_REG_BASE | 0x08) | |
40 | ||
41 | void __init ltq_soc_nmi_setup(void) | |
42 | { | |
43 | extern void (*nmi_handler)(void); | |
44 | ||
45 | ltq_w32((unsigned long)&nmi_handler, (void *)BOOT_NVEC); | |
46 | } | |
47 | ||
48 | void __init ltq_soc_ejtag_setup(void) | |
49 | { | |
50 | extern void (*ejtag_debug_handler)(void); | |
51 | ||
52 | ltq_w32((unsigned long)&ejtag_debug_handler, (void *)BOOT_EVEC); | |
53 | } | |
54 | ||
55 | void __init ltq_soc_detect(struct ltq_soc_info *i) | |
56 | { | |
57 | u32 type; | |
58 | i->partnum = (ltq_r32(FALCON_CHIPID) & PART_MASK) >> PART_SHIFT; | |
59 | i->rev = (ltq_r32(FALCON_CHIPID) & REV_MASK) >> REV_SHIFT; | |
60 | i->srev = ((ltq_r32(FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT); | |
61 | i->compatible = COMP_FALCON; | |
62 | i->type = SOC_TYPE_FALCON; | |
63 | sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'), | |
64 | i->rev & 0x7, (i->srev & 0x3) + 1); | |
65 | ||
66 | switch (i->partnum) { | |
67 | case SOC_ID_FALCON: | |
68 | type = (ltq_r32(FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT; | |
69 | switch (type) { | |
70 | case 0: | |
71 | i->name = SOC_FALCON_D; | |
72 | break; | |
73 | case 1: | |
74 | i->name = SOC_FALCON_V; | |
75 | break; | |
76 | case 2: | |
77 | i->name = SOC_FALCON_M; | |
78 | break; | |
79 | default: | |
80 | i->name = SOC_FALCON; | |
81 | break; | |
82 | } | |
83 | break; | |
84 | ||
85 | default: | |
86 | unreachable(); | |
87 | break; | |
88 | } | |
f8cd170d JC |
89 | |
90 | board_nmi_handler_setup = ltq_soc_nmi_setup; | |
91 | board_ejtag_handler_setup = ltq_soc_ejtag_setup; | |
d41ced01 | 92 | } |